DS3820MAUD1B1A

About the DS3820MAUD1B1A

The DS3820MAUD1B1A is a PCB and HMI combination designed as a component for GE’s Mark IV.  The Mark IV is used for gas/steam turbine management and is built around several microcomputer-based systems that work together to monitor the turbine continuously with intentional redundant backups on all critical controls and parameters.  These intentional redundancies within the system increase reliability and minimize the overall turbine outage rate when compared to GE’s earlier Speedtronic systems.

The DS3820MAUD1B1A is primarily composed of two parts: the interface panel and the PCB.  The specifications of the interface panel are:

• Screw mounted to the PCB via six screw mounts at the front of the panel, plus screw pins that mount over pins attached to the PCB (sides and back.)

• Is marked in its center with “DirectoMaticPlus Control System Freeway Media Access Module.”

• Has three cutouts in the panel.  These are labeled Cable A OK, Cable B OK, and Watchdog Timer OK.   

• Has four markings for cable connections.  These are labeled Cable A (JB/JC) and Cable B (JD/JE.)  These markings correspond to four cable connectors located on the side of the panel.  

• Has two boxes at the top of the panel labeled JA/link controller connector and JG/power connector.

The specifications of the PCB are:

• Is marked DS3800HMAC.

• Is marked on one edge A through J and on another edge 10 through 80, by tens.

• Has six LEDs (red) that are positioned to show through the cutouts in the panel above.

• Has ten jumper switches.

• Has six test points.

• Has two transistors.

• Has multiple integrated circuits, including oscillating chips, hex buffers, and J-K negative edge triggered flip-flops.  

• Has two connectors, including one six-pin header and one PCB mating connector (218A4837-P12.)

DS3820MAUD1B1A had technical support provided by GE.  This included manuals and datasheets.